Empathy May Drive Rats and Other Mammals to Help Friends Over Strangers

This shows two white rats. One is trapped in a box, the other looks as though he is trying to help the other rat get out of the boxWhen a rat helps another within its social group, brain areas associated with reward and motivation become more active. This does not occur when a rat is faced with the prospect of helping another rat outside its social group. Researchers say the findings may provide a better understanding of similar social biases in humans.